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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 613 · 40 questions
TalentJR

What you do (Coins × distance): 1. Balance the ruler on the pencil at its 15 cm mark. 2. Put coins at a measured distance on the left side. 3. Place coins on the right and slide them until the ruler balances. 4. Check: coins × distance on the left = coins × distance on the right; press gently.

NameDateTime takenScore ___ / 40
  1. 1.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a spoon lifting a lid (c) a crane (d) a ramp
  2. 2.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) a 30 cm ruler (d) turmeric powder
  3. 3.True or false: a flat table is needed for the ruler lever. (a) False (b) True
  4. 4.⚙️ Which of these uses a pulley? (a) a see-saw (b) a bottle opener (c) a flagpole (d) a tap handle
  5. 5.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) impossible (d) easier
  6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) yeast
  7. 7.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
  8. 8.⚙️ Which of these is a lever? (a) a tap handle (b) a crowbar (c) a steering wheel (d) a ramp
  9. 9.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
  10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
  11. 11.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
  12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
  13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we change it (b) we measure it (c) we keep it the same
  14. 14.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
  15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) which side goes down (c) the kind of coins (d) the same ruler
  16. 16.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
  17. 17.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
  18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we change it (b) we measure it (c) we keep it the same
  19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) where the pencil is
  20. 20.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
  21. 21.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
  22. 22.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
  23. 23.⚙️ Which of these uses a pulley? (a) a crane (b) a steering wheel (c) a slide (d) a see-saw
  24. 24.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
  25. 25.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
  26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a magnet (d) a round pencil
  27. 27.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
  28. 28.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
  29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is the one thing we change? (a) the number of coins (b) the same ruler (c) the kind of coins (d) distance from the pencil
  30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
  31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a flat table (d) turmeric powder
  32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the same ruler (b) distance from the pencil (c) which side goes down
  33. 33.True or false: a flagpole is a wheel and axle. (a) False (b) True
  34. 34.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) yeast (d) a round pencil
  35. 35.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the right side (c) the left side (d) both go up
  36. 36.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
  37. 37.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) the spoon is hot (d) a lever boosts your push
  38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we keep it the same (b) we measure it (c) we change it
  39. 39.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
  40. 40.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle

Answer key

  1. a ramp
  2. a 30 cm ruler
  3. True
  4. a flagpole
  5. easier
  6. yeast
  7. 6
  8. a crowbar
  9. they may swallow them
  10. True
  11. False
  12. True
  13. we keep it the same
  14. press it gently
  15. which side goes down
  16. 2
  17. a lever
  18. we change it
  19. where the pencil is
  20. the fulcrum
  21. not needed
  22. not needed
  23. a crane
  24. needed
  25. needed
  26. a magnet
  27. a pulley
  28. a pulley
  29. distance from the pencil
  30. a balloon
  31. turmeric powder
  32. the same ruler
  33. False
  34. yeast
  35. the right side
  36. 2
  37. a lever boosts your push
  38. we keep it the same
  39. not needed
  40. a pulley

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